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eLibrary > BS ISO 23742:2024 Test method for the evaluation of permeability and filtration efficiency distribution of bag filter medium >

BS ISO 23742:2024 Test method for the evaluation of permeability and filtration efficiency distribution of bag filter medium, 2024

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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Determination of sampling [Go to Page]
4.1 General
4.2 Collection position, size and shape of representative sample sheets
4.3 Number of representative sample sheets
5 Preparation of specimen strips [Go to Page]
5.1 General
5.2 Standard atmosphere for conditioning and testing
5.3 Conditioning of specimen strips
5.4 Size of specimen strips
6 Measurement method - Thickness [Go to Page]
6.1 General
6.2 Apparatus [Go to Page]
6.2.1 Thickness tester
6.2.2 Thickness gauge
6.3 Procedure
7 Measurement method - Area mass [Go to Page]
7.1 General
7.2 Apparatus [Go to Page]
7.2.1 Precision balance
7.2.2 Calibrated rule
7.3 Procedure
8 Measurement method - Gas permeability [Go to Page]
8.1 General
8.2 Apparatus [Go to Page]
8.2.1 Circular specimen holder
8.2.2 Clamping device
8.2.3 Guard ring device
8.2.4 Pressure gauge or manometer
8.2.5 Blower, fan or pump
8.2.6 Flowmeter, volumetric counter or measuring aperture
8.3 Procedure
9 Measurement method – Filtration efficiency (option)
10 Order of measurement sequence
11 Expression of distribution of each measurement item
12 Test report
Annex A (normative) Sampling survey theory based on normal distribution
Annex B (informative) Analysis example of measurement results
Annex C (informative) Example of relationship between exerting pressure and thickness distribution
Annex D (informative) Example of a test report
Annex E (informative) Example of a test report with measurement results
Bibliography [Go to Page]

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